I have a single server Exchange 2010 installation.
Three times in the past week Outlook Web Access has stopped working, but ONLY for Internet Explorer clients. The forms based authentication login page loads, but no matter what credentials are entered it always returns the message "The user name or password you entered isn't correct. Try entering it again."
Opening just about any other web browser on the same client computer and trying from there with the same credentials works just fine.
This tells me that there is something wrong with the PREMIUM client, but what?
What I have done in the past that seems to have solved the problem, but only temporarily:
- Reapplied Update Rollup 4 for SP2 and restarted.
- Just restarted.
- Recreated the OWA virtual directory and restarted IIS.
I am reluctant to restart the server now in the middle of the day to try options 1 or 2, but option 3 didn't work this time.
Any suggestions? I have tried with multiple IE versions (7 through 9) with the same results.